Don't be bashful! If you want comments, give comments. You don't need to be an expert photographer to express your opinion about the work of others. You don't need to go into great depth. A simple remark about cropping, composition, color, subject matter, etc. can be of just as much help to a budding photographer as an in-depth critique.
For this assignment, shoot a cityscape or landscape that has a foreground, a middle ground, and a background. Your picture should tell a story about the place you are shooting. Emphasize the characteristics that make your chosen place special. Post your image to the Web site to share with others.